A trucker driving for Market Basket was arrested by Tewksbury Police after allegedly leaving his truck and engaging with protesters while holding a hammer outside company headquarters Friday afternoon.

Tewksbury Police confirmed the incident and arrest to Boston.com shortly after it occurred. Media reports identified the man Friday night as Ira Forbes of Brooklyn, NY. He faces charges of disorderly conduct and assault.

WBZ-TV's Ken MacLeod reports that the driver got out of the truck with something at his side wrapped in a towel. There was an exchange of words between the driver and the demonstrators. When police officers realized that the object in his hand was a hammer they quickly tackled him to the ground.

Market Basket has been using replacement truckers since employed truckers walked off the job on July 18 in protest of the firing of Arthur T. Demoulas as CEO. The use of replacement truckers has been criticized by protesters throughout this summer’s standoff.

A Market Basket spokesperson issued a statement following the arrest saying the trucker, and the trucking company he worked for, will no longer be working with the grocery chain.

“We are thankful that local police intervened and that no one was injured. Market Basket of course condemns the driver’s actions. Both the driver and the company for which he worked have been terminated, effective immediately.”

The Market Basket spokesperson told Boston.com the driver worked with large Arkansas-based trucking company J.B. Hunt, which had been working with Market Basket. J.B. Hunt did not immediately respond to a request for comment.

Market Basket headquarters and warehouse workers held the line at corporate offices in Tewksbury Friday despite facing a deadline to return to work or risk losing their jobs.

Many workers facing that deadline have remained steadfast that they will not return without the reinstatement of Arthur T. Demoulas. The former leader, who is still a major shareholder, remains in negotiations to buy-out Market Basket from his rival family members, including his cousin Arthur S. Demoulas. The animosity between the two sides was laid bare Thursday night in board meeting transcripts obtained by The Boston Globe.

Ahead of the deadline, some workers expressed their defiance toward the company’s current chief executives.

Market Basket did not respond to inquiries about the imposed deadline Friday afternoon.

There have been mixed signals from labor lawyers as to what would happen if the workers lose their jobs. The letter alerting employees to Friday’s deadline from co-CEOs Felicia Thornton and James Gooch was carefully worded to suggest those who do not arrive at work will have abandoned their positions. That language would suggest the employees had resigned rather than been terminated, potentially leaving them without much recourse. But other labor lawyers say non-management workers at headquarters and in the warehouses may be protected during the work stoppage. “Even though there’s no union in the picture, these employees are withholding their services collectively and that is a strike,” attorney Keith McCown told The Boston Herald. In other words, such action could get pretty messy.

Meanwhile, about 40 clergy representatives from Merrimack Valley signed a statement calling for resolution Friday, according to The Herald.